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Hi All, Newbie here: I searched the net and forums but I could not find answers to my specific questions so here goes… I'm an old-school player with decades of experience of playing and tinkering. I play heavy blues, hard rock, metal, and classic rock. I have a modified Marshall tube-amp setup (among others) and thinking about pulling the trigger and getting a helix. I want to keep this short so allow me to list my equipment then I'll get to my questions. Friedman-modded Marshall 1959SLP -- this is the foundation of my tone: single-channel amp effects loop (+4db / -10db). 4 holer ganged / normalized to two inputs added gain stage 4x12 cabinet with Celestion G12M 25w Greenbacks Front-end: GCX Audio Switcher with Ground Control Pro foot controller 8 or so stomp boxes ISP decimator Effect-loop: TC-Electronic G-major 2 ISP decimator II 2x QSC K12 monitors: PA (thought I’d include these since they might be useful with helix). My Problems: My TC-Electronic G-Marjor 2: It is unreliable and freezes and I can no longer rely on it. My Marshall is a single-channel monster and I love the dirty tone, but I can’t get clean tones out of it. My Objectives: To continue using my Marshall head to provide my dirty tones. Replace my TC-Electronic G-Major 2 and my front-end stomp boxes with helix. Determine if I can use my marshall with helix and: Bypass my amp's pre-amp with helix in the return of my effects loop to get clean tones with / without effects. Engage front-end input and utilize amp pre-amp for dirty tone. My Questions: Can helix be configured to: Bypass my amps front-end input and give me clean tones via effects-loop return?When I plug my guitar directly into the effects-loop return of my amp, I cant’ seem to control the volume – will helx preamps be able to drive my output levels to match the level of my front-end input? Use my amps front-end and use helix to give me effects in the front-end and effects in the loop? Any creative ways I can use my QSC K12 monitors along with my Marshall? Thank you in advance for your input.